Seminar paper from the year 2022 in the subject Economics - Macro-economics, general, grade: 1.3, University of Münster, language: English, abstract: The objective of this paper is to not only give an overview of Japan's Lost Decades and its pioneering use of monetary and fiscal policy measures, but to also investigate why Japan was unable to lift itself out of the deflationary slump. Over the years, the literature has identified a variety of different factors, that have temporarily pushed the Japanese inflation rate into negative territory, but no single explanation was yet able to reveal the permanence of it. This paper will hence follow the literature in considering different factors, grouping them into demand and supply factors, to ease the analysis. An additional focus of this study will be on the Bank of Japan's pioneering, yet dissatisfying use of monetary policy. Japan's struggle with (consumper price) deflation began in the aftermath of the asset bubble and subsequent banking crisis in the 1990s. The period since then has become known as the Lost Decades, which are characterized by negative output growth, moderate deflation, as well as rising income inequality. While Japan's bouts with deflation are interesting from a practical point of view, regarding their negative consequences on the economy and ultimately the people of Japan, they are even more interesting from a theoretical point of view, as part of a discussion and refinement of alternative theories of economic fluctuations.